Question
Issue: How to Fix Mac App Store Error 100?
I wanted to download particular apps from Mac App store. However, I received an error message saying:
“We could not complete your App Store request. An unknown error occurred (100). There was an error in the App Store. Please try again later.”
I tried to launch the download several times, but the error showed up again. What does it mean?
Solved Answer
App Store Error 100 is an old error message[1] that might pop up on any Mac OS X[2] computer or laptop when you download a necessary app. The specific source of error is unknown. However, it is often related to connectivity issues. Thus, as soon as this error pops up on the screen, you should check if your Wi-Fi or cable connection is fine.
Sometimes the error is temporary. Thus, once you hit OK button and try again after a couple of minutes, you can download needed applications. Restarting Mac might help to solve the issue as well. However, if the problem remains, you have to put a little bit more effort in order to fix App Store Error 100.
Fortunately, it’s not a hard and complicated task. Thus, within few clicks, you should be able to download a necessary app from the Store.
The guidelines for fixing App Store Error 100
App Store Error 100 is one of the errors that are not hard to fix. Often it’s enough to quit or force quite[3] App store and open it again or sing out and sing in again.
Method 1. Force close Mac App Store
- Once you receive an error when trying to download app, keep Mac App Store opened and hit these keys simultaneously: Command + Q
- Hold these keys for about 10 seconds and then release them.
- Launch the Mac App Store again.
Find and try to download a necessary app. Hopefully, now you will succeed. If not, try the second method to fix Mac App Store Error 100.
Method 2. Sign out and sing into the App Store
Before following the steps below, you should force quit Mac App Store as explained in the method above. If you already did it, log out and log in to the store:
1. Open Mac App Store.
2. Click Store button in the top menu bar.
3. Choose Sign out option.
4. Click again the Store button.
5. From the appeared menu choose Sign in and enter your password.
Once these steps are completed, you should not encounter Mac App Store error 100 anymore. Thus, you should be able to download the necessary apps.
Method 3. Sing out from App Store and User account
The third option to fix Mac App Store error 100 requires signing out from both – App Store and Mac OS X user account.
- Open Mac App Store and click Store button at the top menu bar.
- From the appeared drop-down menu choose Sign out option.
- Once you are logged out, click the Apple in the top menu bar.
- From the drop-down menu choose Log Out option.
- Once you are logged out, sing in again.
- Open Mac App Store and log in again.
Try to download an app now. If the error occurs again, you should reboot the computer and then try again. Users report that they were able to fix Mac App Store error 100 only after rebooting their Macs.
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Olivia Morelli is a young, but a perspicacious IT expert who is currently just a year away from a Bachelor’s Degree in Software Systems. Her primary passion is cyber security, however, thanks to her detailed understanding of computer networks, operating systems and hardware, she can find a fix for any PC or Mac issue...
- ^ Lucy Hattersley. Common Mac error messages. Macworld UK. Latest Apple, Mac and iOS news.
- ^ Vangie Beal. Mac OS X. Webopedia. Online Tech Dictionary.
- ^ How to force an app to quit. Apple Support. The official website.
